Defensive publication



i g N DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1068, 849 0.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file or this application is available to the public for inspection; reproduction may be purchased for 30 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED JULY 29, 1969 see 0.6}. 1406 793,560 APPARATUS AND METHOD FOR IMPROVING SOLID PHASE, FLUIDIZED BED POLY- ESTERIFICATION PROCESS Kenneth T. Barkey and Douglas C. May, both of 1669 Lake Ave., Rochester, N.Y. 14650 Filed Jan. 23, 1969. Published July 29, 1969 Int. Cl. C08g 17/003 US. Cl. 260-75 No Drawing. 10 Pages Specification By providing supplementary mechanical agitation (in addition to the agitation supplied by the fluidizing gas) directly to the solid particles of polyester suspended in a hot fluidizing gas stream during the polyesterification step, significantly better uniformity of product, rate of reactivity, and temperature response can be obtained. 

